Safety wut-loojc



No. $752,057. PATENTED PEB. i6, 1904.

L. D. FRENOT.

SAFETY NUT LOCK.

PPM/JAMON FILED APR. z5, 190s.

No MODEL.

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Nrrnn Sri-iras Pztented February 16, 1904.`

:amarti risica..v

SAFETY hiltfir-LOCKn SPECIFICATION forming part of Letters Patent No. 752,057, dated February 18,v 1904.

Application nea April z5, 190s.

To @ZZ who-m, t may concern,.-

Be it known that L Louis D. FRENOT, a citizen of the United States of America, residing at Newark, New Jersey, have invented certain new and useful Improvements in Safety Nut- Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, snch as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to nut-hooks for bolts, and more especially to that class of bolts where resilient and corrugated rings or washers are used. s fg 1n the accompanying drawings, Figure l is d cross-section through a rail with fish-plates, bolt, washers, and nut embodying my invention.` Fig. 2 shows an 'elevation of a spring- 'i ring. Fig. 3 is a front face and cross-section I groove b, into which a tooth c of the springy of a modified form of washer.

The bolt a is provided with a longitudinal ring d, Fig. 2, engages. This tooth is disposeddiametrically opposite the opening between the meeting ends of the ring, by means of which greater resiliency in the ring is obtained. Said ring has at the meeting ends reinforcements e and e', adapted to engage corrugated surfaceson the nut f and on a washer g. The resiliency in this ring is due to the fact that its ends are normally bent out ofthe plane of the ring itself, as seen in Fig. 2, the disposition of said ends being such that normally the adjacent faces are substantially inV the same plane. 'Said washer is not employed in all cases. When the bolt Ais grooved and the spring-ring Z engages the groove with a tooth c, the ring is prevented from turning and the reinforcemente at one end is sulii" In using' a corrugated washer f/ l provider;4 the ring 'of with reinforcements l: and a at both of 'the meeting ends, one to cooperate with the corrugations of the nut f and the Serial No. 154,285. (No model.)

other with the corrugations of the washer g.

Said washer may be sunkin the fish-plate, as shown, and may beprevented from turning by a pin, such as je in Fig. l; but the corrugations may be stamped directly intol the metal of a fish-plate or any other part of the elements to be united by the bolt and nut.

It is evident that by screwing the nut f home the reinforcements e and a will rest in one or the other corrugations in the opposite surfaces of the nut f and the washer g., and any accidental or undesired loosening of the nut` will be impossible. Thelocking of the device in this way will vbe even perfectly safe when the tooth c is omitted and when the bolt a has no groove.

In using my improved nut-look for wooden structures I provide the washer g with pointed pins a, Fig. 3, instead of the pin It, Fig. 1.

' These pointed pins sink in the wood when the y its inner face corrugated Iand a split ring sur- I roundingthe bolt and interposed between the nut and washer, said ring being provided with an inwardly extending toothl diamctrically opposite the opening therein and engaging the groove in the bolt, the .meeting ends of said ring being normally bent out of the plane of the ring itself and provided w ith oppositelydisposed enlargen'ients adapted to engage the corrugations ot' the nut and washer, all substantially as and for the purpose specilied.

In testimony whereof l aliix my signature.

' LOUIS D. FRENQT. In presence of Fannie C. .lila/trimmen,

HARRY W. lCvANs. 

